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1/*
2 * Copyright (c) 2000-2002 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_inode.h"
26#include "xfs_error.h"
27#include "xfs_trans.h"
28#include "xfs_trans_priv.h"
29#include "xfs_quota.h"
30#include "xfs_qm.h"
31
32STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
33
34/*
35 * Add the locked dquot to the transaction.
36 * The dquot must be locked, and it cannot be associated with any
37 * transaction.
38 */
39void
40xfs_trans_dqjoin(
41 xfs_trans_t *tp,
42 xfs_dquot_t *dqp)
43{
44 ASSERT(dqp->q_transp != tp);
45 ASSERT(XFS_DQ_IS_LOCKED(dqp));
46 ASSERT(dqp->q_logitem.qli_dquot == dqp);
47
48 /*
49 * Get a log_item_desc to point at the new item.
50 */
51 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
52
53 /*
54 * Initialize d_transp so we can later determine if this dquot is
55 * associated with this transaction.
56 */
57 dqp->q_transp = tp;
58}
59
60
61/*
62 * This is called to mark the dquot as needing
63 * to be logged when the transaction is committed. The dquot must
64 * already be associated with the given transaction.
65 * Note that it marks the entire transaction as dirty. In the ordinary
66 * case, this gets called via xfs_trans_commit, after the transaction
67 * is already dirty. However, there's nothing stop this from getting
68 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
69 * flag.
70 */
71void
72xfs_trans_log_dquot(
73 xfs_trans_t *tp,
74 xfs_dquot_t *dqp)
75{
76 ASSERT(dqp->q_transp == tp);
77 ASSERT(XFS_DQ_IS_LOCKED(dqp));
78
79 tp->t_flags |= XFS_TRANS_DIRTY;
80 dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
81}
82
83/*
84 * Carry forward whatever is left of the quota blk reservation to
85 * the spanky new transaction
86 */
87void
88xfs_trans_dup_dqinfo(
89 xfs_trans_t *otp,
90 xfs_trans_t *ntp)
91{
92 xfs_dqtrx_t *oq, *nq;
93 int i, j;
94 xfs_dqtrx_t *oqa, *nqa;
95 ulong blk_res_used;
96
97 if (!otp->t_dqinfo)
98 return;
99
100 xfs_trans_alloc_dqinfo(ntp);
101
102 /*
103 * Because the quota blk reservation is carried forward,
104 * it is also necessary to carry forward the DQ_DIRTY flag.
105 */
106 if (otp->t_flags & XFS_TRANS_DQ_DIRTY)
107 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
108
109 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
110 oqa = otp->t_dqinfo->dqs[j];
111 nqa = ntp->t_dqinfo->dqs[j];
112 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
113 blk_res_used = 0;
114
115 if (oqa[i].qt_dquot == NULL)
116 break;
117 oq = &oqa[i];
118 nq = &nqa[i];
119
120 if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
121 blk_res_used = oq->qt_bcount_delta;
122
123 nq->qt_dquot = oq->qt_dquot;
124 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
125 nq->qt_rtbcount_delta = 0;
126
127 /*
128 * Transfer whatever is left of the reservations.
129 */
130 nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
131 oq->qt_blk_res = blk_res_used;
132
133 nq->qt_rtblk_res = oq->qt_rtblk_res -
134 oq->qt_rtblk_res_used;
135 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
136
137 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
138 oq->qt_ino_res = oq->qt_ino_res_used;
139
140 }
141 }
142}
143
144/*
145 * Wrap around mod_dquot to account for both user and group quotas.
146 */
147void
148xfs_trans_mod_dquot_byino(
149 xfs_trans_t *tp,
150 xfs_inode_t *ip,
151 uint field,
152 long delta)
153{
154 xfs_mount_t *mp = tp->t_mountp;
155
156 if (!XFS_IS_QUOTA_RUNNING(mp) ||
157 !XFS_IS_QUOTA_ON(mp) ||
158 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
159 return;
160
161 if (tp->t_dqinfo == NULL)
162 xfs_trans_alloc_dqinfo(tp);
163
164 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
165 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
166 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
167 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
168 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
169 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
170}
171
172STATIC struct xfs_dqtrx *
173xfs_trans_get_dqtrx(
174 struct xfs_trans *tp,
175 struct xfs_dquot *dqp)
176{
177 int i;
178 struct xfs_dqtrx *qa;
179
180 if (XFS_QM_ISUDQ(dqp))
181 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
182 else if (XFS_QM_ISGDQ(dqp))
183 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
184 else if (XFS_QM_ISPDQ(dqp))
185 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
186 else
187 return NULL;
188
189 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
190 if (qa[i].qt_dquot == NULL ||
191 qa[i].qt_dquot == dqp)
192 return &qa[i];
193 }
194
195 return NULL;
196}
197
198/*
199 * Make the changes in the transaction structure.
200 * The moral equivalent to xfs_trans_mod_sb().
201 * We don't touch any fields in the dquot, so we don't care
202 * if it's locked or not (most of the time it won't be).
203 */
204void
205xfs_trans_mod_dquot(
206 xfs_trans_t *tp,
207 xfs_dquot_t *dqp,
208 uint field,
209 long delta)
210{
211 xfs_dqtrx_t *qtrx;
212
213 ASSERT(tp);
214 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
215 qtrx = NULL;
216
217 if (tp->t_dqinfo == NULL)
218 xfs_trans_alloc_dqinfo(tp);
219 /*
220 * Find either the first free slot or the slot that belongs
221 * to this dquot.
222 */
223 qtrx = xfs_trans_get_dqtrx(tp, dqp);
224 ASSERT(qtrx);
225 if (qtrx->qt_dquot == NULL)
226 qtrx->qt_dquot = dqp;
227
228 switch (field) {
229
230 /*
231 * regular disk blk reservation
232 */
233 case XFS_TRANS_DQ_RES_BLKS:
234 qtrx->qt_blk_res += (ulong)delta;
235 break;
236
237 /*
238 * inode reservation
239 */
240 case XFS_TRANS_DQ_RES_INOS:
241 qtrx->qt_ino_res += (ulong)delta;
242 break;
243
244 /*
245 * disk blocks used.
246 */
247 case XFS_TRANS_DQ_BCOUNT:
248 qtrx->qt_bcount_delta += delta;
249 break;
250
251 case XFS_TRANS_DQ_DELBCOUNT:
252 qtrx->qt_delbcnt_delta += delta;
253 break;
254
255 /*
256 * Inode Count
257 */
258 case XFS_TRANS_DQ_ICOUNT:
259 if (qtrx->qt_ino_res && delta > 0) {
260 qtrx->qt_ino_res_used += (ulong)delta;
261 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
262 }
263 qtrx->qt_icount_delta += delta;
264 break;
265
266 /*
267 * rtblk reservation
268 */
269 case XFS_TRANS_DQ_RES_RTBLKS:
270 qtrx->qt_rtblk_res += (ulong)delta;
271 break;
272
273 /*
274 * rtblk count
275 */
276 case XFS_TRANS_DQ_RTBCOUNT:
277 if (qtrx->qt_rtblk_res && delta > 0) {
278 qtrx->qt_rtblk_res_used += (ulong)delta;
279 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
280 }
281 qtrx->qt_rtbcount_delta += delta;
282 break;
283
284 case XFS_TRANS_DQ_DELRTBCOUNT:
285 qtrx->qt_delrtb_delta += delta;
286 break;
287
288 default:
289 ASSERT(0);
290 }
291 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
292}
293
294
295/*
296 * Given an array of dqtrx structures, lock all the dquots associated and join
297 * them to the transaction, provided they have been modified. We know that the
298 * highest number of dquots of one type - usr, grp and prj - involved in a
299 * transaction is 3 so we don't need to make this very generic.
300 */
301STATIC void
302xfs_trans_dqlockedjoin(
303 xfs_trans_t *tp,
304 xfs_dqtrx_t *q)
305{
306 ASSERT(q[0].qt_dquot != NULL);
307 if (q[1].qt_dquot == NULL) {
308 xfs_dqlock(q[0].qt_dquot);
309 xfs_trans_dqjoin(tp, q[0].qt_dquot);
310 } else {
311 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
312 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
313 xfs_trans_dqjoin(tp, q[0].qt_dquot);
314 xfs_trans_dqjoin(tp, q[1].qt_dquot);
315 }
316}
317
318
319/*
320 * Called by xfs_trans_commit() and similar in spirit to
321 * xfs_trans_apply_sb_deltas().
322 * Go thru all the dquots belonging to this transaction and modify the
323 * INCORE dquot to reflect the actual usages.
324 * Unreserve just the reservations done by this transaction.
325 * dquot is still left locked at exit.
326 */
327void
328xfs_trans_apply_dquot_deltas(
329 struct xfs_trans *tp)
330{
331 int i, j;
332 struct xfs_dquot *dqp;
333 struct xfs_dqtrx *qtrx, *qa;
334 struct xfs_disk_dquot *d;
335 long totalbdelta;
336 long totalrtbdelta;
337
338 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
339 return;
340
341 ASSERT(tp->t_dqinfo);
342 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
343 qa = tp->t_dqinfo->dqs[j];
344 if (qa[0].qt_dquot == NULL)
345 continue;
346
347 /*
348 * Lock all of the dquots and join them to the transaction.
349 */
350 xfs_trans_dqlockedjoin(tp, qa);
351
352 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
353 qtrx = &qa[i];
354 /*
355 * The array of dquots is filled
356 * sequentially, not sparsely.
357 */
358 if ((dqp = qtrx->qt_dquot) == NULL)
359 break;
360
361 ASSERT(XFS_DQ_IS_LOCKED(dqp));
362 ASSERT(dqp->q_transp == tp);
363
364 /*
365 * adjust the actual number of blocks used
366 */
367 d = &dqp->q_core;
368
369 /*
370 * The issue here is - sometimes we don't make a blkquota
371 * reservation intentionally to be fair to users
372 * (when the amount is small). On the other hand,
373 * delayed allocs do make reservations, but that's
374 * outside of a transaction, so we have no
375 * idea how much was really reserved.
376 * So, here we've accumulated delayed allocation blks and
377 * non-delay blks. The assumption is that the
378 * delayed ones are always reserved (outside of a
379 * transaction), and the others may or may not have
380 * quota reservations.
381 */
382 totalbdelta = qtrx->qt_bcount_delta +
383 qtrx->qt_delbcnt_delta;
384 totalrtbdelta = qtrx->qt_rtbcount_delta +
385 qtrx->qt_delrtb_delta;
386#ifdef DEBUG
387 if (totalbdelta < 0)
388 ASSERT(be64_to_cpu(d->d_bcount) >=
389 -totalbdelta);
390
391 if (totalrtbdelta < 0)
392 ASSERT(be64_to_cpu(d->d_rtbcount) >=
393 -totalrtbdelta);
394
395 if (qtrx->qt_icount_delta < 0)
396 ASSERT(be64_to_cpu(d->d_icount) >=
397 -qtrx->qt_icount_delta);
398#endif
399 if (totalbdelta)
400 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
401
402 if (qtrx->qt_icount_delta)
403 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
404
405 if (totalrtbdelta)
406 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
407
408 /*
409 * Get any default limits in use.
410 * Start/reset the timer(s) if needed.
411 */
412 if (d->d_id) {
413 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
414 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
415 }
416
417 dqp->dq_flags |= XFS_DQ_DIRTY;
418 /*
419 * add this to the list of items to get logged
420 */
421 xfs_trans_log_dquot(tp, dqp);
422 /*
423 * Take off what's left of the original reservation.
424 * In case of delayed allocations, there's no
425 * reservation that a transaction structure knows of.
426 */
427 if (qtrx->qt_blk_res != 0) {
428 ulong blk_res_used = 0;
429
430 if (qtrx->qt_bcount_delta > 0)
431 blk_res_used = qtrx->qt_bcount_delta;
432
433 if (qtrx->qt_blk_res != blk_res_used) {
434 if (qtrx->qt_blk_res > blk_res_used)
435 dqp->q_res_bcount -= (xfs_qcnt_t)
436 (qtrx->qt_blk_res -
437 blk_res_used);
438 else
439 dqp->q_res_bcount -= (xfs_qcnt_t)
440 (blk_res_used -
441 qtrx->qt_blk_res);
442 }
443 } else {
444 /*
445 * These blks were never reserved, either inside
446 * a transaction or outside one (in a delayed
447 * allocation). Also, this isn't always a
448 * negative number since we sometimes
449 * deliberately skip quota reservations.
450 */
451 if (qtrx->qt_bcount_delta) {
452 dqp->q_res_bcount +=
453 (xfs_qcnt_t)qtrx->qt_bcount_delta;
454 }
455 }
456 /*
457 * Adjust the RT reservation.
458 */
459 if (qtrx->qt_rtblk_res != 0) {
460 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
461 if (qtrx->qt_rtblk_res >
462 qtrx->qt_rtblk_res_used)
463 dqp->q_res_rtbcount -= (xfs_qcnt_t)
464 (qtrx->qt_rtblk_res -
465 qtrx->qt_rtblk_res_used);
466 else
467 dqp->q_res_rtbcount -= (xfs_qcnt_t)
468 (qtrx->qt_rtblk_res_used -
469 qtrx->qt_rtblk_res);
470 }
471 } else {
472 if (qtrx->qt_rtbcount_delta)
473 dqp->q_res_rtbcount +=
474 (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
475 }
476
477 /*
478 * Adjust the inode reservation.
479 */
480 if (qtrx->qt_ino_res != 0) {
481 ASSERT(qtrx->qt_ino_res >=
482 qtrx->qt_ino_res_used);
483 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
484 dqp->q_res_icount -= (xfs_qcnt_t)
485 (qtrx->qt_ino_res -
486 qtrx->qt_ino_res_used);
487 } else {
488 if (qtrx->qt_icount_delta)
489 dqp->q_res_icount +=
490 (xfs_qcnt_t)qtrx->qt_icount_delta;
491 }
492
493 ASSERT(dqp->q_res_bcount >=
494 be64_to_cpu(dqp->q_core.d_bcount));
495 ASSERT(dqp->q_res_icount >=
496 be64_to_cpu(dqp->q_core.d_icount));
497 ASSERT(dqp->q_res_rtbcount >=
498 be64_to_cpu(dqp->q_core.d_rtbcount));
499 }
500 }
501}
502
503/*
504 * Release the reservations, and adjust the dquots accordingly.
505 * This is called only when the transaction is being aborted. If by
506 * any chance we have done dquot modifications incore (ie. deltas) already,
507 * we simply throw those away, since that's the expected behavior
508 * when a transaction is curtailed without a commit.
509 */
510void
511xfs_trans_unreserve_and_mod_dquots(
512 xfs_trans_t *tp)
513{
514 int i, j;
515 xfs_dquot_t *dqp;
516 xfs_dqtrx_t *qtrx, *qa;
517 bool locked;
518
519 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
520 return;
521
522 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
523 qa = tp->t_dqinfo->dqs[j];
524
525 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
526 qtrx = &qa[i];
527 /*
528 * We assume that the array of dquots is filled
529 * sequentially, not sparsely.
530 */
531 if ((dqp = qtrx->qt_dquot) == NULL)
532 break;
533 /*
534 * Unreserve the original reservation. We don't care
535 * about the number of blocks used field, or deltas.
536 * Also we don't bother to zero the fields.
537 */
538 locked = false;
539 if (qtrx->qt_blk_res) {
540 xfs_dqlock(dqp);
541 locked = true;
542 dqp->q_res_bcount -=
543 (xfs_qcnt_t)qtrx->qt_blk_res;
544 }
545 if (qtrx->qt_ino_res) {
546 if (!locked) {
547 xfs_dqlock(dqp);
548 locked = true;
549 }
550 dqp->q_res_icount -=
551 (xfs_qcnt_t)qtrx->qt_ino_res;
552 }
553
554 if (qtrx->qt_rtblk_res) {
555 if (!locked) {
556 xfs_dqlock(dqp);
557 locked = true;
558 }
559 dqp->q_res_rtbcount -=
560 (xfs_qcnt_t)qtrx->qt_rtblk_res;
561 }
562 if (locked)
563 xfs_dqunlock(dqp);
564
565 }
566 }
567}
568
569STATIC void
570xfs_quota_warn(
571 struct xfs_mount *mp,
572 struct xfs_dquot *dqp,
573 int type)
574{
575 enum quota_type qtype;
576
577 if (dqp->dq_flags & XFS_DQ_PROJ)
578 qtype = PRJQUOTA;
579 else if (dqp->dq_flags & XFS_DQ_USER)
580 qtype = USRQUOTA;
581 else
582 qtype = GRPQUOTA;
583
584 quota_send_warning(make_kqid(&init_user_ns, qtype,
585 be32_to_cpu(dqp->q_core.d_id)),
586 mp->m_super->s_dev, type);
587}
588
589/*
590 * This reserves disk blocks and inodes against a dquot.
591 * Flags indicate if the dquot is to be locked here and also
592 * if the blk reservation is for RT or regular blocks.
593 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
594 */
595STATIC int
596xfs_trans_dqresv(
597 xfs_trans_t *tp,
598 xfs_mount_t *mp,
599 xfs_dquot_t *dqp,
600 long nblks,
601 long ninos,
602 uint flags)
603{
604 xfs_qcnt_t hardlimit;
605 xfs_qcnt_t softlimit;
606 time_t timer;
607 xfs_qwarncnt_t warns;
608 xfs_qwarncnt_t warnlimit;
609 xfs_qcnt_t total_count;
610 xfs_qcnt_t *resbcountp;
611 xfs_quotainfo_t *q = mp->m_quotainfo;
612 struct xfs_def_quota *defq;
613
614
615 xfs_dqlock(dqp);
616
617 defq = xfs_get_defquota(dqp, q);
618
619 if (flags & XFS_TRANS_DQ_RES_BLKS) {
620 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
621 if (!hardlimit)
622 hardlimit = defq->bhardlimit;
623 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
624 if (!softlimit)
625 softlimit = defq->bsoftlimit;
626 timer = be32_to_cpu(dqp->q_core.d_btimer);
627 warns = be16_to_cpu(dqp->q_core.d_bwarns);
628 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
629 resbcountp = &dqp->q_res_bcount;
630 } else {
631 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
632 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
633 if (!hardlimit)
634 hardlimit = defq->rtbhardlimit;
635 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
636 if (!softlimit)
637 softlimit = defq->rtbsoftlimit;
638 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
639 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
640 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
641 resbcountp = &dqp->q_res_rtbcount;
642 }
643
644 if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
645 dqp->q_core.d_id &&
646 ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
647 (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
648 (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
649 if (nblks > 0) {
650 /*
651 * dquot is locked already. See if we'd go over the
652 * hardlimit or exceed the timelimit if we allocate
653 * nblks.
654 */
655 total_count = *resbcountp + nblks;
656 if (hardlimit && total_count > hardlimit) {
657 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
658 goto error_return;
659 }
660 if (softlimit && total_count > softlimit) {
661 if ((timer != 0 && get_seconds() > timer) ||
662 (warns != 0 && warns >= warnlimit)) {
663 xfs_quota_warn(mp, dqp,
664 QUOTA_NL_BSOFTLONGWARN);
665 goto error_return;
666 }
667
668 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
669 }
670 }
671 if (ninos > 0) {
672 total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
673 timer = be32_to_cpu(dqp->q_core.d_itimer);
674 warns = be16_to_cpu(dqp->q_core.d_iwarns);
675 warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
676 hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
677 if (!hardlimit)
678 hardlimit = defq->ihardlimit;
679 softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
680 if (!softlimit)
681 softlimit = defq->isoftlimit;
682
683 if (hardlimit && total_count > hardlimit) {
684 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
685 goto error_return;
686 }
687 if (softlimit && total_count > softlimit) {
688 if ((timer != 0 && get_seconds() > timer) ||
689 (warns != 0 && warns >= warnlimit)) {
690 xfs_quota_warn(mp, dqp,
691 QUOTA_NL_ISOFTLONGWARN);
692 goto error_return;
693 }
694 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
695 }
696 }
697 }
698
699 /*
700 * Change the reservation, but not the actual usage.
701 * Note that q_res_bcount = q_core.d_bcount + resv
702 */
703 (*resbcountp) += (xfs_qcnt_t)nblks;
704 if (ninos != 0)
705 dqp->q_res_icount += (xfs_qcnt_t)ninos;
706
707 /*
708 * note the reservation amt in the trans struct too,
709 * so that the transaction knows how much was reserved by
710 * it against this particular dquot.
711 * We don't do this when we are reserving for a delayed allocation,
712 * because we don't have the luxury of a transaction envelope then.
713 */
714 if (tp) {
715 ASSERT(tp->t_dqinfo);
716 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
717 if (nblks != 0)
718 xfs_trans_mod_dquot(tp, dqp,
719 flags & XFS_QMOPT_RESBLK_MASK,
720 nblks);
721 if (ninos != 0)
722 xfs_trans_mod_dquot(tp, dqp,
723 XFS_TRANS_DQ_RES_INOS,
724 ninos);
725 }
726 ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
727 ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
728 ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
729
730 xfs_dqunlock(dqp);
731 return 0;
732
733error_return:
734 xfs_dqunlock(dqp);
735 if (flags & XFS_QMOPT_ENOSPC)
736 return -ENOSPC;
737 return -EDQUOT;
738}
739
740
741/*
742 * Given dquot(s), make disk block and/or inode reservations against them.
743 * The fact that this does the reservation against user, group and
744 * project quotas is important, because this follows a all-or-nothing
745 * approach.
746 *
747 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
748 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
749 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
750 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
751 * dquots are unlocked on return, if they were not locked by caller.
752 */
753int
754xfs_trans_reserve_quota_bydquots(
755 struct xfs_trans *tp,
756 struct xfs_mount *mp,
757 struct xfs_dquot *udqp,
758 struct xfs_dquot *gdqp,
759 struct xfs_dquot *pdqp,
760 long nblks,
761 long ninos,
762 uint flags)
763{
764 int error;
765
766 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
767 return 0;
768
769 if (tp && tp->t_dqinfo == NULL)
770 xfs_trans_alloc_dqinfo(tp);
771
772 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
773
774 if (udqp) {
775 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
776 (flags & ~XFS_QMOPT_ENOSPC));
777 if (error)
778 return error;
779 }
780
781 if (gdqp) {
782 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
783 if (error)
784 goto unwind_usr;
785 }
786
787 if (pdqp) {
788 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
789 if (error)
790 goto unwind_grp;
791 }
792
793 /*
794 * Didn't change anything critical, so, no need to log
795 */
796 return 0;
797
798unwind_grp:
799 flags |= XFS_QMOPT_FORCE_RES;
800 if (gdqp)
801 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
802unwind_usr:
803 flags |= XFS_QMOPT_FORCE_RES;
804 if (udqp)
805 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
806 return error;
807}
808
809
810/*
811 * Lock the dquot and change the reservation if we can.
812 * This doesn't change the actual usage, just the reservation.
813 * The inode sent in is locked.
814 */
815int
816xfs_trans_reserve_quota_nblks(
817 struct xfs_trans *tp,
818 struct xfs_inode *ip,
819 long nblks,
820 long ninos,
821 uint flags)
822{
823 struct xfs_mount *mp = ip->i_mount;
824
825 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
826 return 0;
827 if (XFS_IS_PQUOTA_ON(mp))
828 flags |= XFS_QMOPT_ENOSPC;
829
830 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
831
832 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
833 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
834 XFS_TRANS_DQ_RES_RTBLKS ||
835 (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
836 XFS_TRANS_DQ_RES_BLKS);
837
838 /*
839 * Reserve nblks against these dquots, with trans as the mediator.
840 */
841 return xfs_trans_reserve_quota_bydquots(tp, mp,
842 ip->i_udquot, ip->i_gdquot,
843 ip->i_pdquot,
844 nblks, ninos, flags);
845}
846
847/*
848 * This routine is called to allocate a quotaoff log item.
849 */
850xfs_qoff_logitem_t *
851xfs_trans_get_qoff_item(
852 xfs_trans_t *tp,
853 xfs_qoff_logitem_t *startqoff,
854 uint flags)
855{
856 xfs_qoff_logitem_t *q;
857
858 ASSERT(tp != NULL);
859
860 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
861 ASSERT(q != NULL);
862
863 /*
864 * Get a log_item_desc to point at the new item.
865 */
866 xfs_trans_add_item(tp, &q->qql_item);
867 return q;
868}
869
870
871/*
872 * This is called to mark the quotaoff logitem as needing
873 * to be logged when the transaction is committed. The logitem must
874 * already be associated with the given transaction.
875 */
876void
877xfs_trans_log_quotaoff_item(
878 xfs_trans_t *tp,
879 xfs_qoff_logitem_t *qlp)
880{
881 tp->t_flags |= XFS_TRANS_DIRTY;
882 qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
883}
884
885STATIC void
886xfs_trans_alloc_dqinfo(
887 xfs_trans_t *tp)
888{
889 tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
890}
891
892void
893xfs_trans_free_dqinfo(
894 xfs_trans_t *tp)
895{
896 if (!tp->t_dqinfo)
897 return;
898 kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
899 tp->t_dqinfo = NULL;
900}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2002 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_trans.h"
15#include "xfs_trans_priv.h"
16#include "xfs_quota.h"
17#include "xfs_qm.h"
18#include "xfs_trace.h"
19#include "xfs_error.h"
20#include "xfs_health.h"
21
22STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
23
24/*
25 * Add the locked dquot to the transaction.
26 * The dquot must be locked, and it cannot be associated with any
27 * transaction.
28 */
29void
30xfs_trans_dqjoin(
31 struct xfs_trans *tp,
32 struct xfs_dquot *dqp)
33{
34 ASSERT(XFS_DQ_IS_LOCKED(dqp));
35 ASSERT(dqp->q_logitem.qli_dquot == dqp);
36
37 /*
38 * Get a log_item_desc to point at the new item.
39 */
40 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
41}
42
43/*
44 * This is called to mark the dquot as needing
45 * to be logged when the transaction is committed. The dquot must
46 * already be associated with the given transaction.
47 * Note that it marks the entire transaction as dirty. In the ordinary
48 * case, this gets called via xfs_trans_commit, after the transaction
49 * is already dirty. However, there's nothing stop this from getting
50 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
51 * flag.
52 */
53void
54xfs_trans_log_dquot(
55 struct xfs_trans *tp,
56 struct xfs_dquot *dqp)
57{
58 ASSERT(XFS_DQ_IS_LOCKED(dqp));
59
60 /* Upgrade the dquot to bigtime format if possible. */
61 if (dqp->q_id != 0 &&
62 xfs_has_bigtime(tp->t_mountp) &&
63 !(dqp->q_type & XFS_DQTYPE_BIGTIME))
64 dqp->q_type |= XFS_DQTYPE_BIGTIME;
65
66 tp->t_flags |= XFS_TRANS_DIRTY;
67 set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
68}
69
70/*
71 * Carry forward whatever is left of the quota blk reservation to
72 * the spanky new transaction
73 */
74void
75xfs_trans_dup_dqinfo(
76 struct xfs_trans *otp,
77 struct xfs_trans *ntp)
78{
79 struct xfs_dqtrx *oq, *nq;
80 int i, j;
81 struct xfs_dqtrx *oqa, *nqa;
82 uint64_t blk_res_used;
83
84 if (!otp->t_dqinfo)
85 return;
86
87 xfs_trans_alloc_dqinfo(ntp);
88
89 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
90 oqa = otp->t_dqinfo->dqs[j];
91 nqa = ntp->t_dqinfo->dqs[j];
92 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
93 blk_res_used = 0;
94
95 if (oqa[i].qt_dquot == NULL)
96 break;
97 oq = &oqa[i];
98 nq = &nqa[i];
99
100 if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
101 blk_res_used = oq->qt_bcount_delta;
102
103 nq->qt_dquot = oq->qt_dquot;
104 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
105 nq->qt_rtbcount_delta = 0;
106
107 /*
108 * Transfer whatever is left of the reservations.
109 */
110 nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
111 oq->qt_blk_res = blk_res_used;
112
113 nq->qt_rtblk_res = oq->qt_rtblk_res -
114 oq->qt_rtblk_res_used;
115 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
116
117 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
118 oq->qt_ino_res = oq->qt_ino_res_used;
119
120 }
121 }
122}
123
124#ifdef CONFIG_XFS_LIVE_HOOKS
125/*
126 * Use a static key here to reduce the overhead of quota live updates. If the
127 * compiler supports jump labels, the static branch will be replaced by a nop
128 * sled when there are no hook users. Online fsck is currently the only
129 * caller, so this is a reasonable tradeoff.
130 *
131 * Note: Patching the kernel code requires taking the cpu hotplug lock. Other
132 * parts of the kernel allocate memory with that lock held, which means that
133 * XFS callers cannot hold any locks that might be used by memory reclaim or
134 * writeback when calling the static_branch_{inc,dec} functions.
135 */
136DEFINE_STATIC_XFS_HOOK_SWITCH(xfs_dqtrx_hooks_switch);
137
138void
139xfs_dqtrx_hook_disable(void)
140{
141 xfs_hooks_switch_off(&xfs_dqtrx_hooks_switch);
142}
143
144void
145xfs_dqtrx_hook_enable(void)
146{
147 xfs_hooks_switch_on(&xfs_dqtrx_hooks_switch);
148}
149
150/* Schedule a transactional dquot update on behalf of an inode. */
151void
152xfs_trans_mod_ino_dquot(
153 struct xfs_trans *tp,
154 struct xfs_inode *ip,
155 struct xfs_dquot *dqp,
156 unsigned int field,
157 int64_t delta)
158{
159 xfs_trans_mod_dquot(tp, dqp, field, delta);
160
161 if (xfs_hooks_switched_on(&xfs_dqtrx_hooks_switch)) {
162 struct xfs_mod_ino_dqtrx_params p = {
163 .tx_id = (uintptr_t)tp,
164 .ino = ip->i_ino,
165 .q_type = xfs_dquot_type(dqp),
166 .q_id = dqp->q_id,
167 .delta = delta
168 };
169 struct xfs_quotainfo *qi = tp->t_mountp->m_quotainfo;
170
171 xfs_hooks_call(&qi->qi_mod_ino_dqtrx_hooks, field, &p);
172 }
173}
174
175/* Call the specified functions during a dquot counter update. */
176int
177xfs_dqtrx_hook_add(
178 struct xfs_quotainfo *qi,
179 struct xfs_dqtrx_hook *hook)
180{
181 int error;
182
183 /*
184 * Transactional dquot updates first call the mod hook when changes
185 * are attached to the transaction and then call the apply hook when
186 * those changes are committed (or canceled).
187 *
188 * The apply hook must be installed before the mod hook so that we
189 * never fail to catch the end of a quota update sequence.
190 */
191 error = xfs_hooks_add(&qi->qi_apply_dqtrx_hooks, &hook->apply_hook);
192 if (error)
193 goto out;
194
195 error = xfs_hooks_add(&qi->qi_mod_ino_dqtrx_hooks, &hook->mod_hook);
196 if (error)
197 goto out_apply;
198
199 return 0;
200
201out_apply:
202 xfs_hooks_del(&qi->qi_apply_dqtrx_hooks, &hook->apply_hook);
203out:
204 return error;
205}
206
207/* Stop calling the specified function during a dquot counter update. */
208void
209xfs_dqtrx_hook_del(
210 struct xfs_quotainfo *qi,
211 struct xfs_dqtrx_hook *hook)
212{
213 /*
214 * The mod hook must be removed before apply hook to avoid giving the
215 * hook consumer with an incomplete update. No hooks should be running
216 * after these functions return.
217 */
218 xfs_hooks_del(&qi->qi_mod_ino_dqtrx_hooks, &hook->mod_hook);
219 xfs_hooks_del(&qi->qi_apply_dqtrx_hooks, &hook->apply_hook);
220}
221
222/* Configure dquot update hook functions. */
223void
224xfs_dqtrx_hook_setup(
225 struct xfs_dqtrx_hook *hook,
226 notifier_fn_t mod_fn,
227 notifier_fn_t apply_fn)
228{
229 xfs_hook_setup(&hook->mod_hook, mod_fn);
230 xfs_hook_setup(&hook->apply_hook, apply_fn);
231}
232#endif /* CONFIG_XFS_LIVE_HOOKS */
233
234/*
235 * Wrap around mod_dquot to account for both user and group quotas.
236 */
237void
238xfs_trans_mod_dquot_byino(
239 xfs_trans_t *tp,
240 xfs_inode_t *ip,
241 uint field,
242 int64_t delta)
243{
244 xfs_mount_t *mp = tp->t_mountp;
245
246 if (!XFS_IS_QUOTA_ON(mp) ||
247 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
248 return;
249
250 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
251 xfs_trans_mod_ino_dquot(tp, ip, ip->i_udquot, field, delta);
252 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
253 xfs_trans_mod_ino_dquot(tp, ip, ip->i_gdquot, field, delta);
254 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
255 xfs_trans_mod_ino_dquot(tp, ip, ip->i_pdquot, field, delta);
256}
257
258STATIC struct xfs_dqtrx *
259xfs_trans_get_dqtrx(
260 struct xfs_trans *tp,
261 struct xfs_dquot *dqp)
262{
263 int i;
264 struct xfs_dqtrx *qa;
265
266 switch (xfs_dquot_type(dqp)) {
267 case XFS_DQTYPE_USER:
268 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
269 break;
270 case XFS_DQTYPE_GROUP:
271 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
272 break;
273 case XFS_DQTYPE_PROJ:
274 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
275 break;
276 default:
277 return NULL;
278 }
279
280 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
281 if (qa[i].qt_dquot == NULL ||
282 qa[i].qt_dquot == dqp)
283 return &qa[i];
284 }
285
286 return NULL;
287}
288
289/*
290 * Make the changes in the transaction structure.
291 * The moral equivalent to xfs_trans_mod_sb().
292 * We don't touch any fields in the dquot, so we don't care
293 * if it's locked or not (most of the time it won't be).
294 */
295void
296xfs_trans_mod_dquot(
297 struct xfs_trans *tp,
298 struct xfs_dquot *dqp,
299 uint field,
300 int64_t delta)
301{
302 struct xfs_dqtrx *qtrx;
303
304 ASSERT(tp);
305 ASSERT(XFS_IS_QUOTA_ON(tp->t_mountp));
306 qtrx = NULL;
307
308 if (!delta)
309 return;
310
311 if (tp->t_dqinfo == NULL)
312 xfs_trans_alloc_dqinfo(tp);
313 /*
314 * Find either the first free slot or the slot that belongs
315 * to this dquot.
316 */
317 qtrx = xfs_trans_get_dqtrx(tp, dqp);
318 ASSERT(qtrx);
319 if (qtrx->qt_dquot == NULL)
320 qtrx->qt_dquot = dqp;
321
322 trace_xfs_trans_mod_dquot_before(qtrx);
323 trace_xfs_trans_mod_dquot(tp, dqp, field, delta);
324
325 switch (field) {
326 /* regular disk blk reservation */
327 case XFS_TRANS_DQ_RES_BLKS:
328 qtrx->qt_blk_res += delta;
329 break;
330
331 /* inode reservation */
332 case XFS_TRANS_DQ_RES_INOS:
333 qtrx->qt_ino_res += delta;
334 break;
335
336 /* disk blocks used. */
337 case XFS_TRANS_DQ_BCOUNT:
338 qtrx->qt_bcount_delta += delta;
339 break;
340
341 case XFS_TRANS_DQ_DELBCOUNT:
342 qtrx->qt_delbcnt_delta += delta;
343 break;
344
345 /* Inode Count */
346 case XFS_TRANS_DQ_ICOUNT:
347 if (qtrx->qt_ino_res && delta > 0) {
348 qtrx->qt_ino_res_used += delta;
349 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
350 }
351 qtrx->qt_icount_delta += delta;
352 break;
353
354 /* rtblk reservation */
355 case XFS_TRANS_DQ_RES_RTBLKS:
356 qtrx->qt_rtblk_res += delta;
357 break;
358
359 /* rtblk count */
360 case XFS_TRANS_DQ_RTBCOUNT:
361 if (qtrx->qt_rtblk_res && delta > 0) {
362 qtrx->qt_rtblk_res_used += delta;
363 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
364 }
365 qtrx->qt_rtbcount_delta += delta;
366 break;
367
368 case XFS_TRANS_DQ_DELRTBCOUNT:
369 qtrx->qt_delrtb_delta += delta;
370 break;
371
372 default:
373 ASSERT(0);
374 }
375
376 trace_xfs_trans_mod_dquot_after(qtrx);
377}
378
379
380/*
381 * Given an array of dqtrx structures, lock all the dquots associated and join
382 * them to the transaction, provided they have been modified. We know that the
383 * highest number of dquots of one type - usr, grp and prj - involved in a
384 * transaction is 3 so we don't need to make this very generic.
385 */
386STATIC void
387xfs_trans_dqlockedjoin(
388 struct xfs_trans *tp,
389 struct xfs_dqtrx *q)
390{
391 ASSERT(q[0].qt_dquot != NULL);
392 if (q[1].qt_dquot == NULL) {
393 xfs_dqlock(q[0].qt_dquot);
394 xfs_trans_dqjoin(tp, q[0].qt_dquot);
395 } else {
396 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
397 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
398 xfs_trans_dqjoin(tp, q[0].qt_dquot);
399 xfs_trans_dqjoin(tp, q[1].qt_dquot);
400 }
401}
402
403/* Apply dqtrx changes to the quota reservation counters. */
404static inline void
405xfs_apply_quota_reservation_deltas(
406 struct xfs_dquot_res *res,
407 uint64_t reserved,
408 int64_t res_used,
409 int64_t count_delta)
410{
411 if (reserved != 0) {
412 /*
413 * Subtle math here: If reserved > res_used (the normal case),
414 * we're simply subtracting the unused transaction quota
415 * reservation from the dquot reservation.
416 *
417 * If, however, res_used > reserved, then we have allocated
418 * more quota blocks than were reserved for the transaction.
419 * We must add that excess to the dquot reservation since it
420 * tracks (usage + resv) and by definition we didn't reserve
421 * that excess.
422 */
423 res->reserved -= abs(reserved - res_used);
424 } else if (count_delta != 0) {
425 /*
426 * These blks were never reserved, either inside a transaction
427 * or outside one (in a delayed allocation). Also, this isn't
428 * always a negative number since we sometimes deliberately
429 * skip quota reservations.
430 */
431 res->reserved += count_delta;
432 }
433}
434
435#ifdef CONFIG_XFS_LIVE_HOOKS
436/* Call downstream hooks now that it's time to apply dquot deltas. */
437static inline void
438xfs_trans_apply_dquot_deltas_hook(
439 struct xfs_trans *tp,
440 struct xfs_dquot *dqp)
441{
442 if (xfs_hooks_switched_on(&xfs_dqtrx_hooks_switch)) {
443 struct xfs_apply_dqtrx_params p = {
444 .tx_id = (uintptr_t)tp,
445 .q_type = xfs_dquot_type(dqp),
446 .q_id = dqp->q_id,
447 };
448 struct xfs_quotainfo *qi = tp->t_mountp->m_quotainfo;
449
450 xfs_hooks_call(&qi->qi_apply_dqtrx_hooks,
451 XFS_APPLY_DQTRX_COMMIT, &p);
452 }
453}
454#else
455# define xfs_trans_apply_dquot_deltas_hook(tp, dqp) ((void)0)
456#endif /* CONFIG_XFS_LIVE_HOOKS */
457
458/*
459 * Called by xfs_trans_commit() and similar in spirit to
460 * xfs_trans_apply_sb_deltas().
461 * Go thru all the dquots belonging to this transaction and modify the
462 * INCORE dquot to reflect the actual usages.
463 * Unreserve just the reservations done by this transaction.
464 * dquot is still left locked at exit.
465 */
466void
467xfs_trans_apply_dquot_deltas(
468 struct xfs_trans *tp)
469{
470 int i, j;
471 struct xfs_dquot *dqp;
472 struct xfs_dqtrx *qtrx, *qa;
473 int64_t totalbdelta;
474 int64_t totalrtbdelta;
475
476 if (!tp->t_dqinfo)
477 return;
478
479 ASSERT(tp->t_dqinfo);
480 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
481 qa = tp->t_dqinfo->dqs[j];
482 if (qa[0].qt_dquot == NULL)
483 continue;
484
485 /*
486 * Lock all of the dquots and join them to the transaction.
487 */
488 xfs_trans_dqlockedjoin(tp, qa);
489
490 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
491 uint64_t blk_res_used;
492
493 qtrx = &qa[i];
494 /*
495 * The array of dquots is filled
496 * sequentially, not sparsely.
497 */
498 if ((dqp = qtrx->qt_dquot) == NULL)
499 break;
500
501 ASSERT(XFS_DQ_IS_LOCKED(dqp));
502
503 xfs_trans_apply_dquot_deltas_hook(tp, dqp);
504
505 /*
506 * adjust the actual number of blocks used
507 */
508
509 /*
510 * The issue here is - sometimes we don't make a blkquota
511 * reservation intentionally to be fair to users
512 * (when the amount is small). On the other hand,
513 * delayed allocs do make reservations, but that's
514 * outside of a transaction, so we have no
515 * idea how much was really reserved.
516 * So, here we've accumulated delayed allocation blks and
517 * non-delay blks. The assumption is that the
518 * delayed ones are always reserved (outside of a
519 * transaction), and the others may or may not have
520 * quota reservations.
521 */
522 totalbdelta = qtrx->qt_bcount_delta +
523 qtrx->qt_delbcnt_delta;
524 totalrtbdelta = qtrx->qt_rtbcount_delta +
525 qtrx->qt_delrtb_delta;
526
527 if (totalbdelta != 0 || totalrtbdelta != 0 ||
528 qtrx->qt_icount_delta != 0) {
529 trace_xfs_trans_apply_dquot_deltas_before(dqp);
530 trace_xfs_trans_apply_dquot_deltas(qtrx);
531 }
532
533#ifdef DEBUG
534 if (totalbdelta < 0)
535 ASSERT(dqp->q_blk.count >= -totalbdelta);
536
537 if (totalrtbdelta < 0)
538 ASSERT(dqp->q_rtb.count >= -totalrtbdelta);
539
540 if (qtrx->qt_icount_delta < 0)
541 ASSERT(dqp->q_ino.count >= -qtrx->qt_icount_delta);
542#endif
543 if (totalbdelta)
544 dqp->q_blk.count += totalbdelta;
545
546 if (qtrx->qt_icount_delta)
547 dqp->q_ino.count += qtrx->qt_icount_delta;
548
549 if (totalrtbdelta)
550 dqp->q_rtb.count += totalrtbdelta;
551
552 if (totalbdelta != 0 || totalrtbdelta != 0 ||
553 qtrx->qt_icount_delta != 0)
554 trace_xfs_trans_apply_dquot_deltas_after(dqp);
555
556 /*
557 * Get any default limits in use.
558 * Start/reset the timer(s) if needed.
559 */
560 if (dqp->q_id) {
561 xfs_qm_adjust_dqlimits(dqp);
562 xfs_qm_adjust_dqtimers(dqp);
563 }
564
565 dqp->q_flags |= XFS_DQFLAG_DIRTY;
566 /*
567 * add this to the list of items to get logged
568 */
569 xfs_trans_log_dquot(tp, dqp);
570 /*
571 * Take off what's left of the original reservation.
572 * In case of delayed allocations, there's no
573 * reservation that a transaction structure knows of.
574 */
575 blk_res_used = max_t(int64_t, 0, qtrx->qt_bcount_delta);
576 xfs_apply_quota_reservation_deltas(&dqp->q_blk,
577 qtrx->qt_blk_res, blk_res_used,
578 qtrx->qt_bcount_delta);
579
580 /*
581 * Adjust the RT reservation.
582 */
583 xfs_apply_quota_reservation_deltas(&dqp->q_rtb,
584 qtrx->qt_rtblk_res,
585 qtrx->qt_rtblk_res_used,
586 qtrx->qt_rtbcount_delta);
587
588 /*
589 * Adjust the inode reservation.
590 */
591 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
592 xfs_apply_quota_reservation_deltas(&dqp->q_ino,
593 qtrx->qt_ino_res,
594 qtrx->qt_ino_res_used,
595 qtrx->qt_icount_delta);
596
597 ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
598 ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count);
599 ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
600 }
601 }
602}
603
604#ifdef CONFIG_XFS_LIVE_HOOKS
605/* Call downstream hooks now that it's time to cancel dquot deltas. */
606static inline void
607xfs_trans_unreserve_and_mod_dquots_hook(
608 struct xfs_trans *tp,
609 struct xfs_dquot *dqp)
610{
611 if (xfs_hooks_switched_on(&xfs_dqtrx_hooks_switch)) {
612 struct xfs_apply_dqtrx_params p = {
613 .tx_id = (uintptr_t)tp,
614 .q_type = xfs_dquot_type(dqp),
615 .q_id = dqp->q_id,
616 };
617 struct xfs_quotainfo *qi = tp->t_mountp->m_quotainfo;
618
619 xfs_hooks_call(&qi->qi_apply_dqtrx_hooks,
620 XFS_APPLY_DQTRX_UNRESERVE, &p);
621 }
622}
623#else
624# define xfs_trans_unreserve_and_mod_dquots_hook(tp, dqp) ((void)0)
625#endif /* CONFIG_XFS_LIVE_HOOKS */
626
627/*
628 * Release the reservations, and adjust the dquots accordingly.
629 * This is called only when the transaction is being aborted. If by
630 * any chance we have done dquot modifications incore (ie. deltas) already,
631 * we simply throw those away, since that's the expected behavior
632 * when a transaction is curtailed without a commit.
633 */
634void
635xfs_trans_unreserve_and_mod_dquots(
636 struct xfs_trans *tp)
637{
638 int i, j;
639 struct xfs_dquot *dqp;
640 struct xfs_dqtrx *qtrx, *qa;
641 bool locked;
642
643 if (!tp->t_dqinfo)
644 return;
645
646 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
647 qa = tp->t_dqinfo->dqs[j];
648
649 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
650 qtrx = &qa[i];
651 /*
652 * We assume that the array of dquots is filled
653 * sequentially, not sparsely.
654 */
655 if ((dqp = qtrx->qt_dquot) == NULL)
656 break;
657
658 xfs_trans_unreserve_and_mod_dquots_hook(tp, dqp);
659
660 /*
661 * Unreserve the original reservation. We don't care
662 * about the number of blocks used field, or deltas.
663 * Also we don't bother to zero the fields.
664 */
665 locked = false;
666 if (qtrx->qt_blk_res) {
667 xfs_dqlock(dqp);
668 locked = true;
669 dqp->q_blk.reserved -=
670 (xfs_qcnt_t)qtrx->qt_blk_res;
671 }
672 if (qtrx->qt_ino_res) {
673 if (!locked) {
674 xfs_dqlock(dqp);
675 locked = true;
676 }
677 dqp->q_ino.reserved -=
678 (xfs_qcnt_t)qtrx->qt_ino_res;
679 }
680
681 if (qtrx->qt_rtblk_res) {
682 if (!locked) {
683 xfs_dqlock(dqp);
684 locked = true;
685 }
686 dqp->q_rtb.reserved -=
687 (xfs_qcnt_t)qtrx->qt_rtblk_res;
688 }
689 if (locked)
690 xfs_dqunlock(dqp);
691
692 }
693 }
694}
695
696STATIC void
697xfs_quota_warn(
698 struct xfs_mount *mp,
699 struct xfs_dquot *dqp,
700 int type)
701{
702 enum quota_type qtype;
703
704 switch (xfs_dquot_type(dqp)) {
705 case XFS_DQTYPE_PROJ:
706 qtype = PRJQUOTA;
707 break;
708 case XFS_DQTYPE_USER:
709 qtype = USRQUOTA;
710 break;
711 case XFS_DQTYPE_GROUP:
712 qtype = GRPQUOTA;
713 break;
714 default:
715 return;
716 }
717
718 quota_send_warning(make_kqid(&init_user_ns, qtype, dqp->q_id),
719 mp->m_super->s_dev, type);
720}
721
722/*
723 * Decide if we can make an additional reservation against a quota resource.
724 * Returns an inode QUOTA_NL_ warning code and whether or not it's fatal.
725 *
726 * Note that we assume that the numeric difference between the inode and block
727 * warning codes will always be 3 since it's userspace ABI now, and will never
728 * decrease the quota reservation, so the *BELOW messages are irrelevant.
729 */
730static inline int
731xfs_dqresv_check(
732 struct xfs_dquot_res *res,
733 struct xfs_quota_limits *qlim,
734 int64_t delta,
735 bool *fatal)
736{
737 xfs_qcnt_t hardlimit = res->hardlimit;
738 xfs_qcnt_t softlimit = res->softlimit;
739 xfs_qcnt_t total_count = res->reserved + delta;
740
741 BUILD_BUG_ON(QUOTA_NL_BHARDWARN != QUOTA_NL_IHARDWARN + 3);
742 BUILD_BUG_ON(QUOTA_NL_BSOFTLONGWARN != QUOTA_NL_ISOFTLONGWARN + 3);
743 BUILD_BUG_ON(QUOTA_NL_BSOFTWARN != QUOTA_NL_ISOFTWARN + 3);
744
745 *fatal = false;
746 if (delta <= 0)
747 return QUOTA_NL_NOWARN;
748
749 if (!hardlimit)
750 hardlimit = qlim->hard;
751 if (!softlimit)
752 softlimit = qlim->soft;
753
754 if (hardlimit && total_count > hardlimit) {
755 *fatal = true;
756 return QUOTA_NL_IHARDWARN;
757 }
758
759 if (softlimit && total_count > softlimit) {
760 time64_t now = ktime_get_real_seconds();
761
762 if (res->timer != 0 && now > res->timer) {
763 *fatal = true;
764 return QUOTA_NL_ISOFTLONGWARN;
765 }
766
767 return QUOTA_NL_ISOFTWARN;
768 }
769
770 return QUOTA_NL_NOWARN;
771}
772
773/*
774 * This reserves disk blocks and inodes against a dquot.
775 * Flags indicate if the dquot is to be locked here and also
776 * if the blk reservation is for RT or regular blocks.
777 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
778 */
779STATIC int
780xfs_trans_dqresv(
781 struct xfs_trans *tp,
782 struct xfs_mount *mp,
783 struct xfs_dquot *dqp,
784 int64_t nblks,
785 long ninos,
786 uint flags)
787{
788 struct xfs_quotainfo *q = mp->m_quotainfo;
789 struct xfs_def_quota *defq;
790 struct xfs_dquot_res *blkres;
791 struct xfs_quota_limits *qlim;
792
793 xfs_dqlock(dqp);
794
795 defq = xfs_get_defquota(q, xfs_dquot_type(dqp));
796
797 if (flags & XFS_TRANS_DQ_RES_BLKS) {
798 blkres = &dqp->q_blk;
799 qlim = &defq->blk;
800 } else {
801 blkres = &dqp->q_rtb;
802 qlim = &defq->rtb;
803 }
804
805 if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id &&
806 xfs_dquot_is_enforced(dqp)) {
807 int quota_nl;
808 bool fatal;
809
810 /*
811 * dquot is locked already. See if we'd go over the hardlimit
812 * or exceed the timelimit if we'd reserve resources.
813 */
814 quota_nl = xfs_dqresv_check(blkres, qlim, nblks, &fatal);
815 if (quota_nl != QUOTA_NL_NOWARN) {
816 /*
817 * Quota block warning codes are 3 more than the inode
818 * codes, which we check above.
819 */
820 xfs_quota_warn(mp, dqp, quota_nl + 3);
821 if (fatal)
822 goto error_return;
823 }
824
825 quota_nl = xfs_dqresv_check(&dqp->q_ino, &defq->ino, ninos,
826 &fatal);
827 if (quota_nl != QUOTA_NL_NOWARN) {
828 xfs_quota_warn(mp, dqp, quota_nl);
829 if (fatal)
830 goto error_return;
831 }
832 }
833
834 /*
835 * Change the reservation, but not the actual usage.
836 * Note that q_blk.reserved = q_blk.count + resv
837 */
838 blkres->reserved += (xfs_qcnt_t)nblks;
839 dqp->q_ino.reserved += (xfs_qcnt_t)ninos;
840
841 /*
842 * note the reservation amt in the trans struct too,
843 * so that the transaction knows how much was reserved by
844 * it against this particular dquot.
845 * We don't do this when we are reserving for a delayed allocation,
846 * because we don't have the luxury of a transaction envelope then.
847 */
848 if (tp) {
849 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
850 xfs_trans_mod_dquot(tp, dqp, flags & XFS_QMOPT_RESBLK_MASK,
851 nblks);
852 xfs_trans_mod_dquot(tp, dqp, XFS_TRANS_DQ_RES_INOS, ninos);
853 }
854
855 if (XFS_IS_CORRUPT(mp, dqp->q_blk.reserved < dqp->q_blk.count) ||
856 XFS_IS_CORRUPT(mp, dqp->q_rtb.reserved < dqp->q_rtb.count) ||
857 XFS_IS_CORRUPT(mp, dqp->q_ino.reserved < dqp->q_ino.count))
858 goto error_corrupt;
859
860 xfs_dqunlock(dqp);
861 return 0;
862
863error_return:
864 xfs_dqunlock(dqp);
865 if (xfs_dquot_type(dqp) == XFS_DQTYPE_PROJ)
866 return -ENOSPC;
867 return -EDQUOT;
868error_corrupt:
869 xfs_dqunlock(dqp);
870 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
871 xfs_fs_mark_sick(mp, XFS_SICK_FS_QUOTACHECK);
872 return -EFSCORRUPTED;
873}
874
875
876/*
877 * Given dquot(s), make disk block and/or inode reservations against them.
878 * The fact that this does the reservation against user, group and
879 * project quotas is important, because this follows a all-or-nothing
880 * approach.
881 *
882 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
883 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
884 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
885 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
886 * dquots are unlocked on return, if they were not locked by caller.
887 */
888int
889xfs_trans_reserve_quota_bydquots(
890 struct xfs_trans *tp,
891 struct xfs_mount *mp,
892 struct xfs_dquot *udqp,
893 struct xfs_dquot *gdqp,
894 struct xfs_dquot *pdqp,
895 int64_t nblks,
896 long ninos,
897 uint flags)
898{
899 int error;
900
901 if (!XFS_IS_QUOTA_ON(mp))
902 return 0;
903
904 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
905
906 if (udqp) {
907 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos, flags);
908 if (error)
909 return error;
910 }
911
912 if (gdqp) {
913 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
914 if (error)
915 goto unwind_usr;
916 }
917
918 if (pdqp) {
919 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
920 if (error)
921 goto unwind_grp;
922 }
923
924 /*
925 * Didn't change anything critical, so, no need to log
926 */
927 return 0;
928
929unwind_grp:
930 flags |= XFS_QMOPT_FORCE_RES;
931 if (gdqp)
932 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
933unwind_usr:
934 flags |= XFS_QMOPT_FORCE_RES;
935 if (udqp)
936 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
937 return error;
938}
939
940
941/*
942 * Lock the dquot and change the reservation if we can.
943 * This doesn't change the actual usage, just the reservation.
944 * The inode sent in is locked.
945 */
946int
947xfs_trans_reserve_quota_nblks(
948 struct xfs_trans *tp,
949 struct xfs_inode *ip,
950 int64_t dblocks,
951 int64_t rblocks,
952 bool force)
953{
954 struct xfs_mount *mp = ip->i_mount;
955 unsigned int qflags = 0;
956 int error;
957
958 if (!XFS_IS_QUOTA_ON(mp))
959 return 0;
960
961 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
962 xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
963
964 if (force)
965 qflags |= XFS_QMOPT_FORCE_RES;
966
967 /* Reserve data device quota against the inode's dquots. */
968 error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
969 ip->i_gdquot, ip->i_pdquot, dblocks, 0,
970 XFS_QMOPT_RES_REGBLKS | qflags);
971 if (error)
972 return error;
973
974 /* Do the same but for realtime blocks. */
975 error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
976 ip->i_gdquot, ip->i_pdquot, rblocks, 0,
977 XFS_QMOPT_RES_RTBLKS | qflags);
978 if (error) {
979 xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
980 ip->i_gdquot, ip->i_pdquot, -dblocks, 0,
981 XFS_QMOPT_RES_REGBLKS);
982 return error;
983 }
984
985 return 0;
986}
987
988/* Change the quota reservations for an inode creation activity. */
989int
990xfs_trans_reserve_quota_icreate(
991 struct xfs_trans *tp,
992 struct xfs_dquot *udqp,
993 struct xfs_dquot *gdqp,
994 struct xfs_dquot *pdqp,
995 int64_t dblocks)
996{
997 struct xfs_mount *mp = tp->t_mountp;
998
999 if (!XFS_IS_QUOTA_ON(mp))
1000 return 0;
1001
1002 return xfs_trans_reserve_quota_bydquots(tp, mp, udqp, gdqp, pdqp,
1003 dblocks, 1, XFS_QMOPT_RES_REGBLKS);
1004}
1005
1006STATIC void
1007xfs_trans_alloc_dqinfo(
1008 xfs_trans_t *tp)
1009{
1010 tp->t_dqinfo = kmem_cache_zalloc(xfs_dqtrx_cache,
1011 GFP_KERNEL | __GFP_NOFAIL);
1012}
1013
1014void
1015xfs_trans_free_dqinfo(
1016 xfs_trans_t *tp)
1017{
1018 if (!tp->t_dqinfo)
1019 return;
1020 kmem_cache_free(xfs_dqtrx_cache, tp->t_dqinfo);
1021 tp->t_dqinfo = NULL;
1022}